Sunday , August 7 2022

The loss of herbs in the warmer world – ScienceDaily


Recent research by AWI experts suggests that the survival of descendants of important fish species will deteriorate dramatically if the climatic agreement in Paris fails to reach 1.5 ° C. In the event of ocean heating and oxidation, the Atlantic Code and its Arctic relative polar lambs will have to look for new habitats in the north. Their populations may fall. If so, it may be scary because the polar cork is the most important source of food for the Arctic seals and seaside. At the same time, fishermen may lose the most productive area in the world to attack the Atlantic, which is north of Norway. However, the results of the research show that rigid climatic policies show that the most serious consequences for animals and humans can be avoided.

There are some types of fish that love very cold water – only in cold water. One of them is the Atlantic, popular and favorite food fish. A well-adapted, even polar cocktail, overflows the Arctic seabed. Polar coffee grows at a water temperature of 0 to 1.5 degrees because the embryonated eggs / embryos can develop well at this temperature. On the contrary, Atlantic coffee lasts from 3 to 7 degrees, which is still very cold from the human point of view. AWI researchers Flemming Dahlke and Daniel Storch are convinced that this dependence on cold water can be the fate of both species. Because of climate change, especially in the North Atlantic and Arctic, human greenhouse gases will be much warmer if they can not afford a massive reduction in carbon dioxide emissions. There is also an acidity problem: Carbon dioxide in carbon dioxide is more atmospheric, dissolving carbon dioxide in the ocean. Carbon dioxide contains water that forms carbon dioxide that dissolves the ocean and decomposes it. "The Atlantic code and polar code will double in the future: their habitat will simultaneously warm up and acidify," explains Sea Ecologist Flemming Dalck.

He and Project Leader Dr. Daniel Storch, as the world's first researchers, utilized extensive experiments to investigate how simultaneous oxidation and warming affect the two types of eggs. In this regard, two AWI experts pay special attention to the development of embryos, which, like the larynx, reach a few millimeters in length. At this stage, they are particularly vulnerable to environmental change that they can actually make climate change. The findings of the researchers are as follows: either, or even a small rise in temperature can lead to the death of eggs or deformation of larvae. "As we have seen, the embryos are very sensitive, especially at the early stages of their development," says Flemming Dalk. Experiments have shown that when the water is acidic, the situation is even worse: the number of non-living embryos increases even at optimum temperatures from 7.7 to 20 to 30 per cent.

In addition, the work of two AWI researchers is particularly relevant when integrating laboratory data with designated climatic models. The models suggest how the temperature in different waters affects climate change and how acidified they are. In turn, thanks to experiments, two researchers are now able to determine in what areas the Atlantic Code and polar codex can not be used in the future. Also, it is clear that we can see shifts in fish because adult eggs and embryos have to look for new spawns where they can find favorable conditions for normal development. In this regard, Dahlke and Storch have primarily considered three climatic scenarios: the business-usual scenario that does not have a significant reduction in carbon dioxide emissions by the end of the 21st century; To avoid the effects of climate change, the Earth's temperature can not be increased to 1.5 degrees, ie the ICRC's goal of 1.5 degrees is to achieve a climate warming with moderate warming. Working with the AWI climate model, Martin Butzin, has come up with several interesting conclusions. According to Flemming Dalken, "This is typically the case for the scenario that the situation in the Atlantic is particularly vulnerable in the North Atlantic at the end of this century, and around eighty percent in Iceland and Norway, throwing larvae out of fewer eggs." Generally speaking, the Atlantic population in the North Atlantic may move to the Arctic, but spawning grounds still offer enough conditions. This can be particularly fraught with the problems of the fishing industry, as Iceland and Norway are currently the largest in the Atlantic: about 800,000 tonnes a year, about 2,800,000 euros. According to AWI experts, if these populations fall, the costs may be very high.

Moreover, the usual business scenario looks very bright for white polar coffees. If the water is warmer, it will have a negative impact not only on the north but also on the normal heating scenario, not just as a business scenario. Since the polarity code is dependent on sea ice during the wintering season, the sea level continues to decline, as can be seen if the populations are affected. It is also unclear how far the Atlantic Code attacks the polar codex. The Atlantic code is considerably higher, and it's more aggressive than its polar cousin, so it's a fight for food. Whether or not the drop in the polar populations can be catastrophic because it is the main food for many organisms in the Arctic, including seals, seabed and even whales.

The boundaries of the distribution of fish species depend on the optimum temperature for spawning. Dahlke and Storch experiments have confirmed that for the first time oxidation can be sensitive to fish embriyos not only at high temperatures but also at the lower levels. "We noticed that the young Atlantic has not only the cocktail temperatures but especially the cold," says Daniel Storch. "Acid strengthens this effect." In other words, the extra oxidation of the oxidation reduces the temperature range favorable for the Atlantic code and polar coding. Flemming Dalcken says: "The fish are very high temperatures and, therefore, they are more sensitive to expected heat." This ultimately leads to the potential of two species potentially spawning areas and their living environment is minimal.

Flemming points out to Dalck that although experiments have reached remarkable results, it is difficult to predict fish development. "For example, the survival of embryos and larvae depends on ocean currents and available food." The Atlantic hill is currently near the Lofoten Archipelago, which is located northwest of Norway. Nowadays, waterfowl eggs and later larvae north are waiting for them to live in perfect conditions. "If populations populated by the Atlantic and their spawning scatter continue to the northeast in the future, the fish will grow in systems of different flows," explains Dalcke. "If this happens, we can not even begin to appreciate the impact."

Daniel Storch says, "1.5 ° C prevents the achievement of climatic goals, reducing the dangers of two species by maintaining important burning areas."

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